Browsing by Author "Sasaki, Kaname"

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Optimizing Cold Resistance: The Thermal Design of the MMX Rover IDEFIX's Locomotion Subsystem for the Martian Moon Phobos
(2024 International Conference on Environmnetal Systems, 2024-07-21) Bayer, Ralph; Sasaki, Kaname; Langofer, Viktor; Krämer, Erich; Hacker, Franz; Chalon, Maxime; Barthelmes, Stefan
The Martian Moon eXploration (MMX) mission, spearheaded by the Japan Aerospace Exploration Agency (JAXA) is set to launch in 2024. Its objectives are to conduct the first sample-return of the moon Phobos and collect further scientific data by observing the moon Deimos. The main goal is to understand the origin of both Martian moons. Within this mission, the MMX rover IDEFIX, a collaborative development of the French Centre National d'Éttudes Spatiales (CNES) and the German Aerospace Center (DLR), is designated to serve as a mobile scout and explore the surface of Phobos. Functioning in microgravity, it will perform on-site scientific measurements using various on-board instruments and contribute data for JAXA's sample collecting task. The locomotion subsystem (LSS) of the MMX rover, developed, built, and qualified by DLR's Robotics and Mechatronics Center (RMC), holds a pivotal role in achieving the rover's objectives. It is designed to conduct several high-level requirements, such as the uprighting of the rover after ballistic landing, alignment of the solar cells towards the sun, as well as offering different driving modes to interact with Phobos surface. To ensure the resilience of the LSS under demanding conditions, especially the harsh environment during the cruise phase and the extremely low temperatures of Phobos surface during the night, a comprehensive thermal design was developed. This includes strategies like utilizing an advanced heater zone design featuring double-layer heat foils, thermal straps, SLI foils and material coatings, as well as thermally isolate sensitive mechatronic subcomponents. The design was additionally optimized, e.g. by a careful choice of material combinations to address thermal expansion concerns, while taking precautions against cold welding, and the incorporation of spring elements to maintain preload forces. This paper offers a comprehensive examination of DLR RMC's design for addressing the thermal demands of the LSS in various mission phases.
System Design of the EDEN LUNA Greenhouse: Upgrading EDEN ISS for future Moon mission simulations
(2024 International Conference on Environmnetal Systems, 2024-07-21) Vrakking, Vincent; Philpot, Claudia; Schubert, Daniel; Aksteiner, Niklas; Strowik, Christian; Ksenik, Eugen; Sasaki, Kaname; Toth, Norbert; Franke, Michel; Bunchek, Jess; Bornemann, Gerhild; Holbeck, Ilse; Fonseca Prince, Andre; Rewicki, Ferdinand
The joint DLR-ESA project LUNA aims to develop a facility to simulate future lunar surface exploration missions. As part of this project, the EDEN LUNA project will modify the EDEN ISS semi-closed space analogue greenhouse, which has previously been operated at the German Neumayer Station III in Antarctica from 2018 until 2022, for operation at the LUNA facility in Cologne, Germany. The EDEN ISS Mobile Test Facility will be refurbished and outfitted with updated Controlled Environment Agriculture technologies based on lessons learned from operations in the Antarctic. Additionally, EDEN LUNA will integrate and test two new main payloads. The first payload, the EDEN Versatile End-Effector, will test the use of a robotic arm and hand on a linear rail system for automated plant health monitoring and plant handling. The second payload, the C.R.O.P.® biofilter, will demonstrate conversion of urine into nutrient solution for plant cultivation. This paper introduces the EDEN LUNA project and describes the preliminary system design of the EDEN LUNA greenhouse.